/*
 GNU Maverik - a system for managing display and interaction in 
               Virtual Environment applications.
 Copyright (C) 1999 Advanced Interfaces Group

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA


 The authors can be contacted via:
 www   - http://aig.cs.man.ac.uk
 email - maverik@aig.cs.man.ac.uk
 mail  - Advanced Interfaces Group, Room 2.94, Computer Science Building, 
         University of Manchester, Manchester, M13 9PL, UK
*/

/******************************************************************
*
*	VRML library for C++
*
*	Copyright (C) Satoshi Konno 1996-1997
*
*	File:	BillboardNode.cpp
*
******************************************************************/

#include "SceneGraph.h"

////////////////////////////////////////////////
//	BillboardNode::getBillboardNodeToViewerVector
////////////////////////////////////////////////

void BillboardNode::getBillboardToViewerVector(float vector[3])
{
	SceneGraph *sg = getSceneGraph();
	ViewpointNode *view = sg->getViewpointNode();
	if (view == NULL)
		view = sg->getDefaultViewpointNode();

	float		viewPos[3];
	view->getPosition(viewPos);

	float		bboardPos[] = {0.0f, 0.0f, 0.0f};
	SFMatrix	mx;

	getTransformMatrix(&mx);
	mx.multi(bboardPos);

	SFVec3f	resultVector(viewPos);
	resultVector.sub(bboardPos);
	resultVector.normalize();

	resultVector.getValue(vector);
}

////////////////////////////////////////////////
//	BillboardNode::getAxisOfRotationAndBillboardNodeToViewerPlaneVector
////////////////////////////////////////////////

void BillboardNode::getAxisOfRotationAndBillboardToViewerPlaneVector(float vector[3])
{
}

////////////////////////////////////////////////
//	BillboardNode::getZAxisVectorOnAxisRotationAndBillboardNodeToViewerPlane
////////////////////////////////////////////////

void BillboardNode::getZAxisVectorOnAxisRotationAndBillboardToViewerPlane(float vector[3])
{
}

////////////////////////////////////////////////
//	BillboardNode::getSFMatrix
////////////////////////////////////////////////

void BillboardNode::getSFMatrix(SFMatrix *mOut)
{
}
